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Re: Bug in while() intrinsic ?
BERTRAND Joel <joel.bertrand@systella.fr> writes:
> Ian Lance Taylor wrote:
>> BERTRAND Joel <joel.bertrand@systella.fr> writes:
>>
>>> I'm trying to debug a subroutine in a very long program. You can find
>>> this GPL'd program at http://www.rpl2.net/.
>>
>> It's unlikely that anybody here is going to download and debug your
>> large program. We do better with standlone test cases. I can assure
>> you that the while statement is not broken. I recommend that you step
>> through the code in a debugger and find out what is happening. Sorry
>> I can't be of more help.
>
> If I run it in a debugger (gdb) without any recompilation, it
> _works_ ! I don't look for someone that debugs this program. I only
> give you an example to reproduce this bug. Before my first post, I
> have tried a lot of different configurations (do {} while(), if ()
> break and some others without any differences.). I have tried to debug
> asmb output but if I know sparc and alpha mnemonics, I don't know
> amd64 ones...
A program which fails normally but works when run under the debugger
does not indicate a compiler error. If there are multiple threads,
the most likely problem is a synchronization error. Otherwise the
most likely problem is memory corruption, typically due to a stray
pointer.
Ian